From what i've seen, he's quality in the Werder Bremen side, but he's their best player, everything goes through him. With Brazil i think he's overshadowed a bit by the rest of the stars. Even at Porto he was playing with people like Lucho, Maniche and Quaresma, also i think he meant to be Deco's replacement? Which was quite a hole to fill for them at the time, so he was probably under quite a lot of pressure, and he was young then as well.